EP2309309B1 - Dispositif destiné à la formation de rayons laser - Google Patents

Dispositif destiné à la formation de rayons laser Download PDF

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Publication number
EP2309309B1
EP2309309B1 EP10183938.9A EP10183938A EP2309309B1 EP 2309309 B1 EP2309309 B1 EP 2309309B1 EP 10183938 A EP10183938 A EP 10183938A EP 2309309 B1 EP2309309 B1 EP 2309309B1
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EP
European Patent Office
Prior art keywords
laser
laser diode
cylindrical lenses
respect
lens means
Prior art date
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Active
Application number
EP10183938.9A
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German (de)
English (en)
Other versions
EP2309309B8 (fr
EP2309309A3 (fr
EP2309309A2 (fr
Inventor
Lutz Aschke
Andreas Bayer
Udo Fornahl
Jens Meinschien
Thomas Mitra
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Limo GmbH
Original Assignee
Limo Patentverwaltung GmbH and Co KG
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Publication date
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Publication of EP2309309A3 publication Critical patent/EP2309309A3/fr
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Publication of EP2309309B1 publication Critical patent/EP2309309B1/fr
Publication of EP2309309B8 publication Critical patent/EP2309309B8/fr
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G02B27/0966—Cylindrical lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02251—Out-coupling of light using optical fibres

Definitions

  • the present invention relates to a device for shaping laser radiation according to the preamble of claim 1.
  • In the propagation direction of the laser radiation means mean propagation direction of the laser radiation, especially if this is not a plane wave or at least partially divergent.
  • laser beam, light beam, sub-beam or beam unless expressly stated otherwise, is not meant an idealized beam of geometric optics, but a real beam of light, such as a laser beam with a Gaussian profile or a top-hat profile, which is not infinitesimal small, but has an extended beam cross-section.
  • Light should not only denote the visible spectral range, but also the infrared and ultraviolet spectral range.
  • a device of the type mentioned is from the JP H11 17268 A known.
  • a component is provided on the inlet surface and on the exit surface is provided in each case in an array of cylindrical lenses.
  • the laser radiation emanating from a laser diode bar is collimated by the lens arrays and, in a first embodiment, is mapped together onto an optical fiber by a separate lens arranged behind the component.
  • the cylindrical lenses are designed such that the laser radiation is imaged onto the optical fiber by the cylindrical lenses. Accordingly, the second embodiment has no additional separate lens.
  • Another device for shaping laser radiation is from the JP H09 96760 A known.
  • a component is provided on the entrance surface of a cylindrical lens and on the exit surface of which an array of cylindrical lenses is provided.
  • the emanating from a laser diode bar laser radiation from the lens on the entrance surface with respect to the fast-axis are each mapped to a plurality of optical fibers and mapped by the lenses on the exit side with respect to the slow axis each on one of the optical fibers.
  • Another device for shaping laser radiation is for example from EP 1 006 382 B1 known.
  • the outgoing laser beam from a laser diode bars are focused by a combination of several micro-optics and macro-optics on the entrance surface of an optical fiber. These methods require several components and adjustment steps for coupling the laser diode bar into a fiber and thus a high cost and time factor with respect to the production of a fiber-coupled laser diode module.
  • a monolithic device that has an array of vertically and horizontally offset lenses for fast axis collimation and an array of vertically and horizontally offset lenses for collimation of the slow axis on an exit surface.
  • means for focusing the individual laser beams must be arranged on an entrance surface of an optical fiber in the propagation direction of the laser radiation behind the component.
  • means for vertical displacement of the individual laser beams must be provided in front of the component so that the individual laser beams of a laser diode bar can impinge on the vertically offset cylindrical lenses.
  • the problem underlying the present invention is to provide a device of the type mentioned, which is constructed simpler and / or cheaper and / or more effective.
  • the first and the second lens means are realized on a component.
  • the fiber coupling can be realized with a single component, so that the cost of a corresponding device can be reduced.
  • both the first and the second lens means can cause an image of the laser radiation on the entrance surface of an optical fiber. Furthermore, it is provided to provide an array of cylindrical lenses with regard to the slow axis direction of the laser beams emerging from a laser diode bar, by means of which at least some of the laser beams can be deflected onto the entrance surface of the optical fiber.
  • Cartesian coordinate systems are included in the figures to allow better orientation.
  • the object of the invention is to reduce the beam forming to a minimum of components (one-piece, monolithic micro-optics) and adjustment steps, and thus the cost-effective production of a fiber-coupled laser diode module.
  • This beam shaping is achieved by a single, monolithic and micro-optical component 1 (see Fig. 1 and 2 ), which has a first cylindrical lens 2 on a first surface 1a serving as an entrance surface and an array of second cylindrical lenses 4 rotated 90 ° thereto on a second surface 1b serving as an exit surface.
  • the laser beams 6 emanating from the emitters 3 of a laser diode bar are imaged directly onto the entrance surface 7 of the optical fiber 5 by the first cylindrical lens 2 in the fast-axis direction or the Y direction.
  • the second cylindrical lenses 4 form each individual laser beam 6 in the slow-axis direction or the X direction, decentered in the embodiment shown, on the entrance surface 7 of the optical fiber 5 (see 3 and 4 ).
  • the outer in the X direction or in Fig. 2 upper and lower second cylindrical lenses 4 such asymmetrical, that the out-of-center laser beams 6 are deflected towards the center or to the optical axis 8 of the component 1 (see Fig. 2 and Fig. 4 ).
  • the second cylindrical lenses 4 arranged in the middle of the array or adjacent to the optical axis 8 are symmetrical or only very slightly asymmetrical.
  • the symmetry of the second cylindrical lenses 4 increases from the center to the outside or in Fig. 2 up and down.
  • the optical axis 8 of the component 1 can correspond to the optical axis of the optical fiber or be coaxial with it.
  • Fig. 1 and Fig. 2 the beamforming principle is easy to recognize.
  • the result is a theoretical coupling efficiency (purely geometric optical losses without reflection losses) of about 95%.
  • a coupling efficiency of 90% ⁇ 3% was measured.
  • a plurality of first cylindrical lenses 2 arranged one above the other in the Y direction can be provided. These are tilted relative to one another such that the laser beams emanating from different laser diode bars are deflected with respect to the fast axis or the Y direction toward the center or the optical axis 8 (for the position of the optical axis in the Y direction, see FIG Fig. 1 ).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Semiconductor Lasers (AREA)
  • Laser Beam Processing (AREA)
  • Lenses (AREA)

Claims (6)

  1. Dispositif de formation de rayonnement laser, dans lequel le dispositif peut servir à former les faisceaux laser (6) partant d'une barre de diodes laser avec une pluralité d'émetteurs (3) disposés les uns à côté des autres dans une deuxième direction (X) ou d'une pile de barres de diodes laser avec respectivement une pluralité d'émetteurs (3) disposés les uns à côté des autres dans la deuxième direction (X), et peut former le rayonnement laser de telle sorte que le rayonnement laser peut entrer dans une fibre optique (5), comprenant
    - un composant (1) individuel avec lequel l'injection dans la fibre optique (5) peut être réalisée,
    - des premiers moyens de lentille pour dévier et/ou reproduire ou collimater le rayonnement laser en ce qui concerne une première direction (Y), dans lequel les premiers moyens de lentille sont formés par des structures réfractives dans une première surface (1a) du composant (1), dans lequel la première surface (1a) peut servir de surface d'entrée pour le rayonnement laser, dans lequel les premiers moyens de lentille comprennent au moins une première lentille cylindrique (2) qui est réalisée de telle sorte qu'elle peut reproduire les faisceaux laser (6) de la barre de diodes laser ou de la pile de barres de diodes laser sur la surface d'entrée (7) d'une fibre optique (5) en ce qui concerne la première direction (Y), ainsi que
    - des deuxièmes moyens de lentille pour dévier et/ou reproduire ou collimater le rayonnement laser en ce qui concerne la deuxième direction (X), dans lequel les deuxièmes moyens de lentille sont formés par des structures réfractives dans une deuxième surface (1b) du composant (1), dans lequel la deuxième surface (1b) est en face de la première surface (1a) et peut servir de surface de sortie pour le rayonnement laser, dans lequel les deuxièmes moyens de lentille sont réalisés en tant que réseau de deuxièmes lentilles cylindriques (4), et dans lequel au moins certaines des deuxièmes lentilles cylindriques (4) du réseau de deuxièmes lentilles cylindriques (4) sont réalisées de telle sorte qu'elles peuvent reproduire les faisceaux laser (6) de la barre de diodes laser ou de la pile de barres de diodes laser sur la surface d'entrée (7) d'une fibre optique (5) en ce qui concerne la deuxième direction (X),
    - dans lequel les premiers et les deuxièmes moyens de lentille sont conformés de telle sorte que les premiers tout comme les deuxièmes moyens de lentille peuvent causer une reproduction du rayonnement laser sur la surface d'entrée précisément d'une fibre optique (5),
    caractérisé en ce qu'au moins certaines des deuxièmes lentilles cylindriques (4) du réseau de deuxièmes lentilles cylindriques (4) sont asymétriques et, par conséquent, des extérieurs parmi les faisceaux laser (6) de la barre de diodes laser ou de la pile de barres de diodes laser peuvent dévier des faisceaux laser (6) de manière plus puissante que des intérieurs parmi les faisceaux laser (6) de la barre de diodes laser ou de la pile de barres de diodes laser en ce qui concerne la deuxième direction (X), et que chacune des deuxièmes lentilles cylindriques (4) est affectée à un des émetteurs (3) et dévie le faisceau laser (6) partant de l'émetteur (3) respectif en ce qui concerne la deuxième direction (X).
  2. Dispositif selon la revendication 1, caractérisé en ce que le composant (1) est un composant monolithique (1).
  3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la première direction (Y) correspond à l'axe rapide et la deuxième direction (X), à l'axe lent.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'au moins une première lentille cylindrique (2) est orientée verticalement par rapport aux deuxièmes lentilles cylindriques (4).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la totalité des deuxièmes lentilles cylindriques (4) du réseau de deuxièmes lentilles cylindriques (4) sont réalisées de telle sorte qu'elles peuvent reproduire les faisceaux laser (6) de la barre de diodes laser ou de la pile de barres de diodes laser sur la surface d'entrée (7) d'une fibre optique (5) en ce qui concerne la deuxième direction (X).
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les premiers moyens de lentille présentent une pluralité de premières lentilles cylindriques (2) disposées les unes à côté des autres dans la première direction (Y), dans lequel des différentes parmi les premières lentilles cylindriques (2) peuvent dévier de manière différente les faisceaux laser (6) de différentes barres de diodes laser d'une pile de barres de diodes laser en ce qui concerne la première direction (Y).
EP10183938.9A 2009-10-01 2010-09-30 Dispositif destiné à la formation de rayons laser Active EP2309309B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009047989 2009-10-01

Publications (4)

Publication Number Publication Date
EP2309309A2 EP2309309A2 (fr) 2011-04-13
EP2309309A3 EP2309309A3 (fr) 2011-06-29
EP2309309B1 true EP2309309B1 (fr) 2018-03-07
EP2309309B8 EP2309309B8 (fr) 2018-05-23

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ID=43413451

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Application Number Title Priority Date Filing Date
EP10183938.9A Active EP2309309B8 (fr) 2009-10-01 2010-09-30 Dispositif destiné à la formation de rayons laser

Country Status (5)

Country Link
US (1) US8639071B2 (fr)
EP (1) EP2309309B8 (fr)
JP (1) JP2011076092A (fr)
CN (1) CN102081234B (fr)
ES (1) ES2671053T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014026713A1 (fr) 2012-08-15 2014-02-20 Limo Patentverwaltung Gmbh & Co. Kg Dispositif de formation de faisceau et dispositif à laser équipé d'au moins un dispositif de formation de faisceau
DE102013102599A1 (de) * 2013-03-14 2014-09-18 Limo Patentverwaltung Gmbh & Co. Kg Beleuchtungsvorrichtung
DE102013103422B4 (de) 2013-04-05 2022-01-05 Focuslight Technologies Inc. Vorrichtung zur Erzeugung von Laserstrahlung mit einer linienförmigen Intensitätsverteilung
US9496675B1 (en) * 2013-07-09 2016-11-15 Science Research Laboratory, Inc. Method and reflective apparatus for combining high-power laser beams
DE102013114083B4 (de) 2013-12-16 2018-10-25 LIMO GmbH Vorrichtung zur Formung von Laserstrahlung
JP5885782B2 (ja) 2014-06-24 2016-03-15 株式会社住田光学ガラス 光学系

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Publication number Priority date Publication date Assignee Title
JPH0996760A (ja) * 1995-09-29 1997-04-08 Mitsui Petrochem Ind Ltd 光学装置
JPH1117268A (ja) * 1997-06-23 1999-01-22 Res Dev Corp Of Japan 半導体レーザーアレイ装置

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JPH08146250A (ja) * 1994-11-15 1996-06-07 Namiki Precision Jewel Co Ltd 集光レンズおよびその製造方法
DE19635942A1 (de) * 1996-09-05 1998-03-12 Vitaly Dr Lissotschenko Optisches Strahlformungssystem
US5973853A (en) * 1998-05-06 1999-10-26 Lucent Technologies, Inc. Cruciform cylindrical lens for elliptical beam transformation
EP1006382B1 (fr) * 1998-10-30 2002-09-18 Lissotschenko, Vitalij Ensemble et dispositif de conversion optique d'un faisceau lumineux
US6407870B1 (en) 1999-10-28 2002-06-18 Ihar Hurevich Optical beam shaper and method for spatial redistribution of inhomogeneous beam
WO2001035145A1 (fr) * 1999-11-10 2001-05-17 Hamamatsu Photonics K.K. Lentille optique et systeme optique
US6700709B1 (en) * 2002-03-01 2004-03-02 Boston Laser Inc. Configuration of and method for optical beam shaping of diode laser bars
SE524401C2 (sv) * 2002-05-17 2004-08-03 Cobolt Ab Arrangemang och metod för tillverkning av Grin-linser
JP2004145362A (ja) * 2002-05-27 2004-05-20 Oki Electric Ind Co Ltd レンズ
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Publication number Priority date Publication date Assignee Title
JPH0996760A (ja) * 1995-09-29 1997-04-08 Mitsui Petrochem Ind Ltd 光学装置
JPH1117268A (ja) * 1997-06-23 1999-01-22 Res Dev Corp Of Japan 半導体レーザーアレイ装置

Also Published As

Publication number Publication date
CN102081234B (zh) 2016-07-27
US8639071B2 (en) 2014-01-28
CN102081234A (zh) 2011-06-01
EP2309309B8 (fr) 2018-05-23
ES2671053T3 (es) 2018-06-04
JP2011076092A (ja) 2011-04-14
EP2309309A3 (fr) 2011-06-29
US20110110626A1 (en) 2011-05-12
EP2309309A2 (fr) 2011-04-13

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